Double-speed leakage-proof speed reducer
By setting up a multi-layer sealing structure and pressure relief system in the shaft hole gap of the reducer, the problem of oil leakage in the transmission shaft of the reducer is solved, and the effect of leakage prevention and pressure relief is achieved, avoiding pollution and waste.
Patent Information
- Application Number
- CN202421316301.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The transmission shaft and shaft hole gap of existing reducers are prone to oil leakage after long-term operation, resulting in pollution and waste.
A two-speed leakage-proof reducer is designed. The sealing and leakage are achieved by setting a preliminarily sealed rubber pad, reinforced and sealed carbon fiber sealing pad and oil-swinging plate at the gap of the shaft hole, combined with the structure of the pressure relief chamber and the ball blocking system. The effect of pressing.
It effectively prevents the leakage of lubricant, avoids pollution and waste, and at the same time realizes pressure relief inside the sealing cylinder, ensuring the long-term and efficient operation of the reducer.
Smart Images
Figure CN222502620U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reducers, in particular to a double-speed leakage-proof reducer. Background Art
[0002] The two-speed reducer is a reducer with a dual-speed function, that is, the same reducer has two different reduction ratios. The drive shaft of the reducer is installed in the transmission box through a bearing mechanism. At least one end of the input shaft and the output shaft of the reducer must extend out of the transmission box. However, after long-term use during operation, the lubricating oil inside the chassis will leak out through the gap between the drive shaft and the shaft hole, causing waste and pollution. Utility Model Content
[0003] 1. Technical issues to be resolved
[0004] In view of the deficiencies in the prior art, the utility model provides a dual-speed anti-leakage reducer, which solves the problem that the clearance between the transmission shaft and the shaft hole of the prior reducer is prone to oil leakage after long-term operation, resulting in pollution and waste.
[0005] (II) Technical solution
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a two-speed leakage-proof reducer, comprising a chassis, a sealing cylinder fixedly installed inside the chassis, an axial hole is opened at the center position of the sealing cylinder, an output shaft extending to the outside of the chassis passes through the axial hole, the outside of the sealing cylinder is connected to a sealing cover jointly sleeved on the output shaft, the outer surface of the sealing cover is provided with a plurality of outwardly protruding ribs, a plurality of mounting holes are opened at corresponding positions of the sealing cylinder and the sealing cover, a pressure relief chamber is provided inside the sealing cylinder corresponding to the inner side of the ribs, a baffle ball is provided inside the pressure relief chamber, a spring is connected between the baffle ball and the edge position of the axial hole, and an oil-slinging pan fixedly sleeved on the outer side of the output shaft is also provided inside the sealing cylinder.
[0007] Preferably, the sealing cylinder and the sealing cover have the same cross-sectional shape and are adapted to be connected, and a sealing bolt and an exhaust net are respectively installed in each two adjacent mounting holes on the sealing cylinder and the sealing cover.
[0008] Preferably, the sealing bolt and the exhaust net are respectively located on two adjacent rib backs, a rubber ring is provided at the connecting gap between the sealing cylinder and the sealing cover, and a sealing groove matching the rubber ring is provided at the edge of the connecting gap between the sealing cylinder and the sealing cover.
[0009] Preferably, a rubber sealing ring is provided at the connection gap between the sealing cover and the output shaft, a carbon fiber sealing pad is provided between the rubber sealing ring and the oil-slinging pan, and the thickness of the carbon fiber sealing pad is greater than that of the rubber sealing ring.
[0010] Preferably, the inner and outer edges of the carbon fiber sealing plate are in close contact with the outer surface of the output shaft and the inner wall of the sealing cover respectively, the rear end face of the carbon fiber sealing plate extends into the internal space of the sealing tube, and the rear end face of the carbon fiber sealing plate is lower than the horizontal height of the end face on one side of the pressure relief chamber.
[0011] Preferably, the pressure relief chamber is a truncated cone structure with a diameter gradually increasing from the inside to the outside, the number of pressure relief chambers is the same as the number of exhaust nets and corresponds to each other, the pressure relief chamber is interconnected with the mounting hole, and the innermost end face diameter of the pressure relief chamber is smaller than the diameter of the baffle ball.
[0012] (III) Beneficial effects
[0013] Compared with the prior art, the utility model provides a dual-speed anti-leakage reducer, which has the following beneficial effects:
[0014] By respectively arranging a rubber pad for preliminary sealing, a carbon fiber sealing pad plate for reinforced sealing and an oil-slinging plate at the shaft hole gap, when the lubricating oil splashes onto the rotating oil-slinging plate, it moves in the same trajectory as the rotating oil-slinging plate, and the end face of the oil-slinging plate and the opening space on one side of the end face of the pressure relief chamber are staggered, so that the splashed lubricating oil is difficult to flow out along the port of the pressure relief chamber, thereby achieving a leakage-proof effect.
[0015] By arranging a baffle ball at the pressure relief chamber, when the pressure difference between the inside and outside of the sealing cylinder is large, the baffle ball no longer seals the pressure relief chamber, and the gas in the sealing cylinder is gradually discharged outward through the pressure relief chamber, the mounting hole and the exhaust net, thereby achieving the effect of pressure relief inside the sealing cylinder, and at the same time achieving the effects of leak prevention and pressure relief, avoiding pollution and waste. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:
[0017] Figure 1 This is the appearance diagram of the chassis and output shaft of the utility model;
[0018] Figure 2 This is a front view of the chassis and output shaft of the utility model;
[0019] Figure 3 This is a cross-sectional view of the internal structure of the sealing cylinder of the utility model.
[0020] Description of reference numerals:
[0021] 1. Chassis; 11. Output shaft; 2. Sealing cylinder; 20. Shaft hole; 21. Mounting hole; 22. Pressure relief chamber; 23. Stop ball; 24. Spring; 25. Oil thrower; 3. Sealing cover; 31. Ribbed back; 32. Sealing bolt; 33. Exhaust net. DETAILED DESCRIPTION
[0022] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.
[0023] Example
[0024] like Figure 1-Figure 3 As shown, the utility model double-speed leakage-proof reducer comprises a chassis 1, a sealing cylinder 2 is fixedly installed inside the chassis 1, an axial hole 20 is opened at the center position of the sealing cylinder 2, an output shaft 11 extending to the outside of the chassis 1 passes through the axial hole 20, the outside of the sealing cylinder 2 is connected to a sealing cover 3 which is jointly sleeved on the output shaft 11, the outer surface of the sealing cover 3 is provided with a plurality of outwardly protruding ribs 31, a plurality of mounting holes 21 are opened at corresponding positions of the sealing cylinder 2 and the sealing cover 3, the sealing cylinder 2 and the sealing cover 3 have the same cross-sectional shape and the two are adapted to be connected, a sealing bolt 32 and an exhaust net 33 are respectively installed in each two adjacent mounting holes 21 on the sealing cylinder 2 and the sealing cover 3, a sealing gasket is arranged between the sealing bolt 32 and the mounting hole 21, and the gas inside the sealing cylinder 2 can be discharged outward through the exhaust net 33.
[0025] Among them, the sealing bolt 32 and the exhaust net 33 are respectively located on two adjacent rib backs 31, a rubber ring is arranged at the connecting gap between the sealing cylinder 2 and the sealing cover 3, and a sealing groove matching the rubber ring is opened at the edge of the connecting gap between the sealing cylinder 2 and the sealing cover 3, and a rubber sealing ring is also arranged at the connecting gap between the sealing cover 3 and the output shaft 11, and the setting of the rubber ring and the rubber sealing ring performs preliminary sealing of the two gaps.
[0026] Furthermore, the interior of the sealing cylinder 2 is also provided with an oil-slinging plate 25 fixedly sleeved on the outside of the output shaft 11, and the oil-slinging plate 25 can rotate synchronously with the output shaft 11. A carbon fiber sealing pad is provided between the rubber sealing ring and the oil-slinging plate 25. The thickness of the carbon fiber sealing pad is greater than that of the rubber sealing ring, and the shaft hole gap can be further sealed. The inner and outer edges of the carbon fiber sealing pad are in close contact with the outer surface of the output shaft 11 and the inner wall of the sealing cover 3 respectively. The carbon fiber sealing pad has good wear resistance, ensuring that the reducer can be used efficiently for a long time. During the operation, the rear end face of the carbon fiber sealing pad extends into the internal space of the sealing cylinder 2. When the lubricating oil first splashes onto the rotating oil-slinging plate 25, since the blades of the oil-slinging plate 25 are of an arc-shaped structure, the splashing lubricating oil and the oil-slinging plate 25 have the same motion trajectory, and the rear end face of the carbon fiber sealing pad is lower than the horizontal height of the end face of one side of the pressure relief chamber 22, so that the end face of the oil-slinging plate 25 and the opening space of the end face of one side of the pressure relief chamber 22 are staggered. Therefore, it is difficult for the splashing lubricating oil to flow outward along the port of the pressure relief chamber 22, thereby achieving a leak-proof effect.
[0027] Furthermore, a pressure relief chamber 22 is provided inside the sealing cylinder 2 corresponding to the inner side of the corrugated back 31, a ball block 23 is provided inside the pressure relief chamber 22, a spring 24 is connected between the ball block 23 and the edge of the shaft hole 20, the pressure relief chamber 22 is a truncated cone structure with a diameter gradually increasing from the inside to the outside, the number of pressure relief chambers 22 is the same as the number of exhaust nets 33 and corresponds to each other, the pressure relief chamber 22 is interconnected with the mounting hole 21, and the innermost end face diameter of the pressure relief chamber 22 is smaller than the diameter of the ball block 23, and the spring 24 is in a compressed state under normal conditions and exerts an inward pulling force on the ball block 23. At the same time, the baffle ball 23 seals one end opening of the pressure relief chamber 22. When the pressure difference between the inside and outside of the sealing tube 2 is large, the internal pressure of the sealing tube 2 is large and greater than the inward pulling force of the spring 24 on the baffle ball 23, the spring 24 stretches to a certain extent. At this time, the baffle ball 23 will also move outward to a certain extent. At this time, the baffle ball 23 no longer seals the pressure relief chamber 22, and the gas in the sealing tube 2 is gradually discharged outward through the pressure relief chamber 22, the mounting hole 21 and the exhaust net 33, thereby achieving the effect of pressure relief inside the sealing tube 2. After the pressure is balanced, the baffle ball 23 seals the pressure relief chamber 22 again.
[0028] When the above embodiment is working, the spring 24 is in a compressed state under normal conditions and generates an inward pulling force on the baffle ball 23. At the same time, the baffle ball 23 seals one end opening of the pressure relief chamber 22. When the pressure difference between the inside and outside of the sealing cylinder 2 is large, the baffle ball 23 no longer seals the pressure relief chamber 22, and the gas in the sealing cylinder 2 is gradually discharged outward through the pressure relief chamber 22, the mounting hole 21 and the exhaust net 33, thereby achieving the effect of pressure relief inside the sealing cylinder 2. After the pressure is balanced, the baffle ball 23 seals the pressure relief chamber 22 again. When the lubricating oil first splashes onto the rotating oil-slinging plate 25, since the blades of the oil-slinging plate 25 are an arc-shaped structure, the splashed lubricating oil and the oil-slinging plate 25 have the same movement trajectory, and the rear side end face of the carbon fiber sealing pad is lower than the horizontal height of the end face of one side of the pressure relief chamber 22, so that the end face of the oil-slinging plate 25 and the opening space of the end face of one side of the pressure relief chamber 22 are staggered. Therefore, the splashed lubricating oil is difficult to flow outward along the port of the pressure relief chamber 22, thereby achieving the effects of leakage prevention and pressure relief at the same time.
[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A dual-speed anti-leakage reducer, comprising a chassis (1), characterized in that: A sealing cylinder (2) is fixedly installed inside the chassis (1), an axial hole (20) is provided at the center of the sealing cylinder (2), an output shaft (11) extending to the outside of the chassis (1) is penetrated in the axial hole (20), the outside of the sealing cylinder (2) is connected to a sealing cover (3) which is sleeved on the output shaft (11), the outer surface of the sealing cover (3) is provided with a plurality of outwardly protruding corrugated backs (31), a plurality of mounting holes (21) are provided at corresponding positions of the sealing cylinder (2) and the sealing cover (3), a pressure relief chamber (22) is provided inside the sealing cylinder (2) corresponding to the inner side of the corrugated backs (31), a blocking ball (23) is provided inside the pressure relief chamber (22), a spring (24) is connected between the blocking ball (23) and the edge of the axial hole (20), and an oil-slinging plate (25) which is fixedly sleeved on the outer side of the output shaft (11) is also provided inside the sealing cylinder (2).
2. The double-speed anti-leakage reducer according to claim 1, characterized in that: The sealing cylinder (2) and the sealing cover (3) have the same cross-sectional shape and are adapted to be connected to each other. A sealing bolt (32) and an exhaust net (33) are respectively installed in each of two adjacent installation holes (21) on the sealing cylinder (2) and the sealing cover (3).
3. The dual-speed anti-leakage reducer according to claim 2 is characterized in that: The sealing bolt (32) and the exhaust net (33) are respectively located on two adjacent corrugated backs (31); a rubber ring is provided at the connection gap between the sealing cylinder (2) and the sealing cover (3); and a sealing groove matching the rubber ring is provided at the edge of the connection gap between the sealing cylinder (2) and the sealing cover (3).
4. The double-speed anti-leakage reducer according to claim 1, characterized in that: A rubber sealing ring is also provided at the connection gap between the sealing cover (3) and the output shaft (11), and a carbon fiber sealing pad is provided between the rubber sealing ring and the oil-slinging pan (25), wherein the thickness of the carbon fiber sealing pad is greater than the thickness of the rubber sealing ring.
5. The dual-speed anti-leakage reducer according to claim 4, characterized in that: The inner and outer edges of the carbon fiber sealing pad are in close contact with the outer surface of the output shaft (11) and the inner wall of the sealing cover (3), respectively; the rear end face of the carbon fiber sealing pad extends into the internal space of the sealing cylinder (2); and the rear end face of the carbon fiber sealing pad is lower than the horizontal height of the end face of one side of the pressure relief chamber (22).
6. The double-speed anti-leakage reducer according to claim 1, characterized in that: The pressure relief chamber (22) is a truncated cone structure with a diameter gradually increasing from the inside to the outside. The number of the pressure relief chambers (22) is the same as the number of the exhaust nets (33) and corresponds to each other. The pressure relief chamber (22) and the mounting hole (21) are interconnected, and the innermost end surface diameter of the pressure relief chamber (22) is smaller than the diameter of the blocking ball (23).